Senior Backend Developer (m/f/d)

Who we are

Sandbox Interactive is the ambitious game development studio behind the award-winning game Albion Online. The game is the first true cross-platform MMO, and is playable on Windows, Mac, Linux, iOS and Android with more than 350.000 daily players and over 2 million monthly visitors on our website. We started as a small independent group of experienced gaming professionals in 2012, and now employ an international team of more than 100 people. Since 2020, Sandbox Interactive has been part of the Stillfront Group. Our team is passionate about making Albion Online the best game it can be, and we’re constantly on the lookout for talented individuals to join our growing team in the heart of Berlin.

Your Game

As a Senior Backend Developer, you will help design, develop, and maintain the systems that keep Albion Online world running smoothly. You’ll work on backend features and services that support millions of players, ensuring stability, scalability and performance across a continuously evolving live environment.

This role requires deep technical expertise, a proactive mindset and a passion for large-scale online systems. You’ll collaborate closely with game developers and designers to deliver reliable tools, features and infrastructure that enhance the gameplay experience and support ongoing content updates.

• Architect and maintain high-throughput backend systems that power Albion Online’s large-scale, persistent world

• Develop and optimize server-side gameplay features, live tools and real-time networking systems using C#

• Work with our Release Operations team to ensure smooth deployment of patches and content updates

• Ensure system reliability, performance and scalability across global regions and large player populations

• Implement monitoring and observability tools to improve issue detection and system resilience

• Collaborate with client engineers and game designers to integrate gameplay logic and backend functionality

• Participate in code reviews, architectural discussions and technical planning for feature growth and long-term system health

• Support and mentor other engineers, fostering a culture of technical pragmatism and performance

Your Talent

Minimum Qualifications:

• 5+ years of experience in backend or network programming for online or multiplayer games

• Strong proficiency in C# and experience with the Unity engine

• Proven experience with client-server architecture, game server logic and live game maintenance

• Solid understanding of database systems (SQL/NoSQL), cloud environments and distributed server infrastructure

• Experience with performance optimization, debugging, and profiling in large-scale systems

• Excellent communication skills (presentation, verbal and written) in English

Preferred Qualifications:

• Experience working on MMORPGs or sandbox games

• Familiarity with Albion Online or similar persistent-world systems

• Understanding of live operations workflows, including event management, hot fixing and content rollout

• Knowledge of DevOps practices, monitoring tools and CI/CD pipelines

• Passion for games and player-driven online experiences

Our Offer

• BVG corporate ticket :

  • Receive a free company ticket for Germany's public transportation system

• Personal Development:

  • Have a high degree of autonomy and ownership from the start

  • Develop your skills through company-sponsored training and language courses

  • Enjoy company-sponsored tickets for Devcom & Gamescom in Cologne

• Hybrid Work model:

  • Combine the best of both worlds, and enjoy the freedom to switch between working in the office and working remotely

• Work-life Balance:

  • Discounted membership to Urban Sport Club for fitness and wellness

  • Extra vacation days awarded based on years of service, up to a maximum of 30 days annually

• Modern & Well-Equipped Office :

  • Work in the heart of Prenzlauer Berg, a central, vibrant neighborhood in Berlin with many dining and entertainment options

  • Enjoy height-adjustable tables, ergonomic chair options, dimmable lighting, and acoustic panels

• Start-up perks :

  • Benefit from free drinks and snacks in the office

  • Participate in team events, breakfast weeks, summer and winter parties

• Sustainable business :

  • Be part of a successful, profitable company on a continued growth path

• Gaming-driven culture :

  • Work alongside a supportive team of gaming enthusiasts who are deeply committed to their craft

• Global reach :

  • Join a team of industry experts shaping a game enjoyed by hundreds of thousands worldwide